The answer is true. the reason is because the us traded with Britain, Britain to Africa, and Africa to the us.
C. Early humans , so before settlers
I think the correct answer would be the first option. The terms plausible and believable are synonyms. Plausible means something that is probable, acceptable, it is likely true. Believable would mean the same as well, it is something that is realistic, credible or acceptable. Words or phrases that means the same are synonyms.
